body {
  font: 16px/28px 'Microsoft YaHei';
}
h1 {
  font-weight: 400;
  text-align: center;
}
.gray {
  color:#888888;
  font-size: 12px;
  text-align: center;
}
a {
  text-decoration: none;
}
.search {
  color: #666;
  width: 170px;
}
.btn {
  font-weight: 700;
}
p {
  text-indent: 2em;
}
.pic {
  text-align: center;
}
.footer {
  color: #888888;
  font-size: 12px;
}